package designMode.observerPattern;

import java.util.ArrayList;
import java.util.Observable;

/**
 * @ClassName WeatherData
 * @Description
 * @Author LIBOFEI
 * @Date 2020/6/14 18:52
 * @Version 1.0
 **/
public class WeatherData implements Subject {


    private ArrayList<Observer> observers;
    private float temperature;
    private float humidity;
    private float pressure;

    public WeatherData(){
        observers = new ArrayList<>();
    }

    @Override
    public void registerObserver(Observer o) {
        observers.add(o);
    }

    @Override
    public void removeObserver(Observer o) {
        int i = observers.indexOf(o);
        if(i > -1){
            observers.remove(i);
        }
    }

    @Override
    public void notifyObservers() {
        for(Observer o : observers){
            o.update(temperature,humidity,pressure);
        }
    }

    public void measurementsChanged(){
        notifyObservers();
    }

    public void setMeasurements(float temperature,float humidity,float pressure){
        this.temperature = temperature;
        this.humidity = humidity;
        this.pressure = pressure;
        measurementsChanged();
    }
}
